CN109553187A - A kind of method of anaerobic reactor mass transfer enhancement - Google Patents

A kind of method of anaerobic reactor mass transfer enhancement Download PDF

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Publication number
CN109553187A
CN109553187A CN201710931978.3A CN201710931978A CN109553187A CN 109553187 A CN109553187 A CN 109553187A CN 201710931978 A CN201710931978 A CN 201710931978A CN 109553187 A CN109553187 A CN 109553187A
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China
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sieve
mass transfer
liquid
anaerobic
transfer enhancement
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CN201710931978.3A
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Chinese (zh)
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曹井国
段书惠
王春虎
杨宗政
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Tianjin University of Science and Technology
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Tianjin University of Science and Technology
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Priority to CN201710931978.3A priority Critical patent/CN109553187A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2813Anaerobic digestion processes using anaerobic contact processes

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The present invention provides a kind of method of anaerobic reactor mass transfer enhancement, and the method increases the mode of Hydrodynamic turbulence by the setting alternately arranged sieve tray of discount vibram outlet type, improves gas-liquid mass transfer effect;There are two types of the sieve pores, and one is positive loudspeaker type holes, and one is the type holes of falling loudspeaker;The effect for the biogas depended on pressure that anaerobic sludge digestion generates is flowed up from the positive horn mouth of sieve tray, and small part liquid is flowed up by sieve pore, and most of liquid streams movement between sieve plate, further increases gas-liquid disturbance;Granule sludge settles downwards by gravity from the courage jacking mouth of sieve tray, and flow disturbance generates shearing force, can promote the formation of granule sludge.This method can effectively facilitate the mass transfer between gas, liquid, solid, be conducive to the contact metabolism of anaerobe, improve the Anaerobic Treatment effect and methane conversion of sewage.

Description

A kind of method of anaerobic reactor mass transfer enhancement
Technical field
The invention belongs to technical field of sewage more particularly to a kind of sides of mass transfer enhancement anaerobic reactor treatment effect Method, in particular to be method by adding mass transfer effect between sieve plate reinforced anaerobic digestion process gas, liquid, solid three-phase.
Background technique
UASB reactor be exploitation earliest, using one of most common anaerobic reactor, it is big by Dutch Wageingen agricultural Lettinga professor et al. researches and develops successfully the 1970s.So far, the UASB reactor of whole world installation alreadys exceed 3000.The course of work of UASB is usually that raw water enters UASB reactor bottom through water pump, successively passes through suspended sludge upwards Layer, three phase separator and overflow weir, are contacted in suspended sludge layer with anaerobic sludge, after complicated biochemical reaction, with production The sludge of raw biogas and carrier band flows up, and separates through three phase separator, and gas is collected and is discharged in gas chamber, and water outlet is through overflowing Flow weir overflow discharge.
UASB reactor has the characteristics that structure is simple, easy to operate, however, UASB reactor COD volumetric loading is not high, Treatment effeciency is low, endures industry to the fullest extent always and denounces, and how to improve the treatment efficiency and operation stability of anaerobic biological treatment, and one It is directly the problem for perplexing domestic and international Anaerobic Biotechnology field scholar and engineering staff.Theoretically, 1g COD 25 DEG C, standard it is big 382mL methane gas can be converted under air pressure, even if laboratory level, the anaerobic methane transformation rate of waste water is not higher than theoretical value 70%, actual UASB engineering due to extraneous factor interfere, such as inflow temperature, pH value, impact load influence, methane conversion Rate is even more to be far below laboratory level.
In anaerobic waste water biological treatment, the design and runnability of reactor remove with participate in reaction process microorganism (or Enzyme) class character has outside close relationship, and also and flowing and troubled water of the reaction mass in reactor have great relationship. In reactor the flowing of material not only influence to react with troubled water or treatment process in substrate transformation efficiency, but also and technique Operation stability, the investment of required reaction time and equipment it is related, thus fluidised form type is to determine reaction carry out situation Important engineering factor.It take Expanded Granular Sludge Bed Reactor (EGSB) and inner circulation reactor (IC) as the third generation anaerobism of representative Fluidized-bed reactor has the characteristics that the concern that high efficiency, stability and economy cause people, but EGSB and IC reactor is gathered around Some outer loops and internal circulation and biggish ratio of height to diameter, make the extremely huge increase of operation difficulty, and starting and domestication are difficult;It returns The development of Gu Jinnian anaerobic reactor is only wanted it is not difficult to find that the structure optimization of anaerobic reactor is set about with sludge fluidization Sludge is asked to be in suspended state or with certain back-mixing effect, could not set about from change less turbulence and mass transfer effect, detest In oxygen reaction zone, gas, liquid, solid three-phase moves in the same direction, and whole is in plug-flow state, and less turbulence is not high, mass transfer mainly by Free diffusing ignores the relationship between the fluid flowing of anaerobic processes and mass transfer.
In conclusion being badly in need of starting with by anaerobic reactor hydraulics characteristic, improve anaerobic reactor using means are strengthened Interior hydraulic characteristic improves the mass transfer effect of gas-liquid-solid heterogeneous object system, and then improves anaerobic bio-treated effect and produce first Alkane ability.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of method of anaerobic reactor mass transfer enhancement, the mass transfer is strong The method of change is the setting alternately arranged sieve tray of discount vibram outlet type in anaerobic reactor, the sieve plate spacing and reactor diameter it Than being 0.5-1: 1, sieve plate area is 0.5-0.75 times of reactor cross section product;Be provided on the sieve tray positive trumpet type sieve pore and The sieve pore of falling trumpet type, the ratio between trumpet type slot size section are 2-3: 1, diameter 2-5mm;
The method of the mass transfer enhancement includes such as the next stage:
1) biogas flowing stage: the positive trumpet type sieve pore of biogas depended on pressure effect from sieve tray that anaerobic processes generate is upward Flowing, turbulent fluid increase the probability of bubble hit, and the size of bubble will be gradually increased;
2) liquid phase fluid flow process: small part liquid is flowed up by sieve pore, most of liquid make between sieve plate around Momentum transmitting occurs with the bubble moved upwards for stream movement, further increases liquid phase disturbance;
3) solid sludges infall process: granule sludge is successively settled by the sieve pore of falling trumpet type to lower layer by gravity, The effect of liquid and gas hydrodynamic shear promotes the formation of granule sludge.
The present invention has the advantage that is with beneficial effect: in the case where gas-liquid-solid three-phase fluidised form is different, this method will have Effect promote gas, liquid, solid between mass transfer, be conducive to the contact metabolism of anaerobe, improve sewage treatment effect and Methane conversion.
Detailed description of the invention
Fig. 1 is sieve plate arrangement schematic diagram in reactor;
Fig. 2 is sieve plate (left opening) structural plan schematic diagram;
Fig. 3 is sieve plate (right opening) structural plan schematic diagram;
Fig. 4 is sieve plate schematic cross-section;
Fig. 5 is biogas bubble growth process schematic;
Fig. 6 is anaerobic digestion reaction mechanism schematic diagram.
Specific embodiment
Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
A kind of method of anaerobic reactor mass transfer enhancement, which is characterized in that the method for the mass transfer enhancement is anti-in anaerobism It answers and discount vibram outlet type alternately arranged sieve tray is set in device, the ratio between the sieve plate spacing and reactor diameter are 0.5-1: 1, sieve plate face Product is 0.5-0.75 times of reactor cross section product;Positive trumpet type sieve pore and the sieve pore of falling trumpet type are provided on the sieve tray, it is described The ratio between trumpet type slot size section is 2-3: 3, diameter 2-5mm;
The method of the mass transfer enhancement includes such as the next stage:
1) biogas flowing stage: the positive trumpet type sieve pore of biogas depended on pressure effect from sieve tray that anaerobic processes generate is upward Flowing, turbulent fluid increase the probability of bubble hit, and the size of bubble will be gradually increased;
2) liquid phase fluid flow process: small part liquid is flowed up by sieve pore, most of liquid make between sieve plate around Momentum transmitting occurs with the bubble moved upwards for stream movement, further increases liquid phase disturbance;
3) solid sludges infall process: granule sludge is successively settled by the sieve pore of falling trumpet type to lower layer by gravity, The effect of liquid and gas hydrodynamic shear promotes the formation of granule sludge.
In reactor bottom, the N layers of alternately arranged sieve tray of discount vibram outlet type are set, make to be formed between sieve plate into water main body around Stream, is also able to achieve turbulent flow in Reynolds number very little in this way.Hole of the biogas depended on pressure effect that anaerobic processes generate from sieve tray Flow up, turbulent fluid increases the probability of bubble hit, and the size of bubble will be gradually increased, the bubble moved upwards again with Momentum transmitting occurs for the liquid of horizontal flow-disturbing, further promotes disturbance;Sludge by gravity by sieve pore to lower sediment, The effect of hydrodynamic shear facilitates the formation of granule sludge, and in the case where gas-liquid-solid three-phase fluidised form is different, this method will have Effect promote gas, liquid, solid between mass transfer, be conducive to the contact metabolism of anaerobe, improve sewage treatment effect and Methane conversion.
One embodiment of the present invention has been described in detail above, but the content is only preferable implementation of the invention Example, should not be considered as limiting the scope of the invention.It is all according to all the changes and improvements made by the present patent application range Deng should still be within the scope of the patent of the present invention.

Claims (3)

1. a kind of method of anaerobic reactor mass transfer enhancement, which is characterized in that the method for the mass transfer enhancement is in anaerobic reaction Discount vibram outlet type alternately arranged sieve tray is set in device, and the ratio between the sieve plate spacing and reactor diameter are 0.5-1: 1, sieve plate area It is 0.5-0.75 times of reactor cross section product.
2. the method for anaerobic reactor mass transfer enhancement according to claim 1, which is characterized in that be provided with just on the sieve tray Trumpet type sieve pore and the sieve pore of falling trumpet type, the ratio between trumpet type slot size section are 2-3: 1, diameter 2-5mm.
3. the method for anaerobic reactor mass transfer enhancement described in -2 according to claim 1, which is characterized in that the mass transfer enhancement Method includes such as the next stage:
1) biogas flowing stage: the biogas depended on pressure effect that anaerobic processes generate is from the positive trumpet type sieve pore of sieve tray to upstream Dynamic, turbulent fluid increases the probability of bubble hit, and the size of bubble will be gradually increased;
2) liquid phase fluid flow process: small part liquid is flowed up by sieve pore, and most of liquid streams fortune between sieve plate It is dynamic, momentum transmitting occurs with the bubble moved upwards, further increases liquid phase disturbance;
3) solid sludges infall process: granule sludge is successively settled by the sieve pore of falling trumpet type to lower layer by gravity, liquid phase Promote the formation of granule sludge with gaseous fluid shearing force.
CN201710931978.3A 2017-09-27 2017-09-27 A kind of method of anaerobic reactor mass transfer enhancement Pending CN109553187A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112919612A (en) * 2021-01-22 2021-06-08 北创清源(北京)科技有限公司 Rotational flow gas-liquid uniform distribution type sewage treatment device, sewage treatment system and sewage treatment method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269314A (en) * 2008-05-04 2008-09-24 天津大学 Screen aperture reticular lamina corrugated filler tablet and regular packing
JP2010042352A (en) * 2008-08-12 2010-02-25 Ebara Corp Anaerobic treatment method and apparatus
CN201704126U (en) * 2010-06-17 2011-01-12 江西理工大学 Anaerobe sieve-plate tower
CN104591379A (en) * 2014-12-02 2015-05-06 深圳职业技术学院 Anaerobic reactor used for processing sludge-containing sewage
KR20160041740A (en) * 2015-03-26 2016-04-18 주식회사 에코스타 Multi-stage high rate filtering facilities with upflow and maintenance method thereof
CN106315843A (en) * 2016-09-23 2017-01-11 同济大学 Reactor for efficiently intercepting anaerobic ammonium oxidation bacteria under low-temperature conditions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269314A (en) * 2008-05-04 2008-09-24 天津大学 Screen aperture reticular lamina corrugated filler tablet and regular packing
JP2010042352A (en) * 2008-08-12 2010-02-25 Ebara Corp Anaerobic treatment method and apparatus
CN201704126U (en) * 2010-06-17 2011-01-12 江西理工大学 Anaerobe sieve-plate tower
CN104591379A (en) * 2014-12-02 2015-05-06 深圳职业技术学院 Anaerobic reactor used for processing sludge-containing sewage
KR20160041740A (en) * 2015-03-26 2016-04-18 주식회사 에코스타 Multi-stage high rate filtering facilities with upflow and maintenance method thereof
CN106315843A (en) * 2016-09-23 2017-01-11 同济大学 Reactor for efficiently intercepting anaerobic ammonium oxidation bacteria under low-temperature conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112919612A (en) * 2021-01-22 2021-06-08 北创清源(北京)科技有限公司 Rotational flow gas-liquid uniform distribution type sewage treatment device, sewage treatment system and sewage treatment method

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